/Engine/Source/Runtime/Engine/Classes/GameFramework/RootMotionSource.h
Serialize the root motion sources and their states for this group
bool NetSerialize ( [FArchive](API\Runtime\Core\Serialization\FArchive) & Ar, class [UPackageMap](API\Runtime\CoreUObject\UObject\UPackageMap) * Map, bool & bOutSuccess, uint8 MaxNumRootMotionSourcesToSerialize )